Why you need to change from non-studded winter tyres during summer

There is a big difference between winter and summer tires. For winter tyres you have both studded and non-studded tyres. The studs help to get traction on ice and both have a tread design that can ensure that they get good grip on snow and slush. The tread ensures that snow doesn’t get stuck in the tread pattern and it pushes away slush to avoid slushplaning. This design is very different from what is needed on a summer tyre.

In addition to the tread design also the rubber compound is different in winter tyres, as the rubber needs to remain soft even at very low temperatures, so the winter tyres are optimized for just winter temperatures and for the grip needed on winter roads. So even the non-studded tires that might seem quite similar to a summer tyre, is actually a very different tire, with different tread design and different rubber compound that is used in the summer tyre. If you drive with winter tyres even if they were non-studded, the rubber would become very soft and would wear out much faster than intended. So you should switch to summer tyres that are designed for these conditions.

Summer tyres have a rubber compound that is designed for
warm weathers, so they have the optimal hardness during summers and will not
wear out too fast. They will give you optimal performance in terms of grip and
handling when you drive in summer conditions. They have also been optimized to
handle summer rain, so that they have grip on wet surfaces. They are also optimized
for preventing aquaplaning, so that you can drive safely during heavy rain.

In a similar way you should not drive with your summer tyres
when you have winter conditions, as the rubber compound that has been optimized
for summer temperatures will become very hard and will not give you the
necessary grip needed even on dry cold roads. If you then add snow and ice into
the equation it becomes very dangerous to drive with summer tyres. This is the
reason why it is important to change tyres between the seasons.